Examinando por Autor "P. Martin"

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  • Miniatura
    Ítem
    Geogebra in the visualization of integrating factors in non-exact differential equations
    (2024) Jorge Olivares; P. Martin; E. Valero
    In the present work, integrating factors used in the solution of non-exact differential equations will be shown with general examples through software application of dynamic geometry GeoGebra. Now these applets are part of theteaching support material in the eigineering careers of the University of Antofagasta on 2020.
  • Miniatura
    Ítem
    MPQA method applied to the plasma dispersion function
    (2024) E. Morales Campaña; P. Martin
    A new approximation method for the plasma dispersion function Z(ζ) is presented. Multipoint quasi-rational approximation technique is used to find a bridge function that connects the power series and the asymptotic expansion of the function Z(ζ) using rational functions combined with exponential functions. An approximation with a polynomial of degree 10 is performed for the function Z(ζ), and the results obtained are compared with those of previous approximations from the literature. The results of this approximation were a relative error of ε = 0.0035 for Re[˜Z(ζ)] and a relative error of ε = 0.0011 for Im[˜Z(ζ)], which are lower than those of the other existing approximations